/*
 * Tencent is pleased to support the open source community by making BK-JOB蓝鲸智云作业平台 available.
 *
 * Copyright (C) 2021 THL A29 Limited, a Tencent company.  All rights reserved.
 *
 * BK-JOB蓝鲸智云作业平台 is licensed under the MIT License.
 *
 * License for BK-JOB蓝鲸智云作业平台:
 * --------------------------------------------------------------------
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
 * to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of
 * the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
 * THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

package com.tencent.bk.job.execute.engine.variable;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.LinkedList;
import java.util.List;

/**
 * 步骤内置变量解析
 */
@Service
@Slf4j
public class JobBuildInVariableResolver {

    private List<VariableResolver> variableResolvers = new LinkedList<>();

    @Autowired
    public JobBuildInVariableResolver(JobLastHostsVariableResolver jobLastHostsVariableResolver,
                                      JobNamespaceVariableResolver jobNamespaceVariableResolver) {
        this.variableResolvers.add(jobLastHostsVariableResolver);
        this.variableResolvers.add(jobNamespaceVariableResolver);
    }

    /**
     * 解析步骤的内置变量值
     *
     * @param context  变量解析上下文
     * @param variable 变量名
     * @return 变量值
     */
    public VariableResolveResult resolve(VariableResolveContext context, String variable) {
        for (VariableResolver variableResolver : variableResolvers) {
            if (variableResolver.isMatch(variable)) {
                return VariableResolveResult.buildResolveResult(variableResolver.resolve(context, variable));
            }
        }
        return VariableResolveResult.buildUnresolvedResult();
    }
}
